V4L/DVB (4864): TDA826x I2C read with 2 messages (8949f1a2) · Commits · 戴 / test

Added a dump I2C message to the TDA826x-driver to fix I2C read for identification with ttusb2-driver. Signed-off-by:

drivers/media/dvb/frontends/tda826x.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -132,18 +132,21 @@ struct dvb_frontend tda826x_attach(struct dvb_frontend fe, int addr, struct i2
		{
		struct tda826x_priv *priv = NULL;
		u8 b1 [] = { 0, 0 };
		struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 };
		struct i2c_msg msg[2] = {
		{ .addr = addr, .flags = 0, .buf = NULL, .len = 0 },
		{ .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 }
		};
		int ret;

		dprintk("%s:\n", __FUNCTION__);

		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
		ret = i2c_transfer (i2c, &msg, 1);
		ret = i2c_transfer (i2c, msg, 2);
		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

		if (ret != 1)
		if (ret != 2)
		return NULL;
		if (!(b1[1] & 0x80))
		return NULL;